DETERMINATION OF DAMAGE VARIABLE BY MEASUREMENT OF DIFFERENTIAL PERMEABILITY

Štefan Barta – Peter Dieška –Ivan Tomáš –Jan Bydžovský

The aim of this paper is to introduce a modified damage variable for control and security purposes and to determine relation between the modified damage variable
and a certain component of the plastic part of the linear strain tensor. Two relations for determination of the above-mentioned relation were derived. The
first one is a relation between the effective differential permeability and the modified damage variable. The second one is the time evolution law for the
modified damage variable.